Briseis

Briseis (Brise`is) , a young virgin priestess, who fell to the lot of Achilles
among the spoil of a victory, but whom Agamemnon carried off from him,
whereupon he retired to his tent and sullenly refused to take any further
part in the war, to its prolongation, in consequence, as Homer relates,
for ten long years; the theme of the “Iliad” being the “wrath of
Achilles” on this account, and what it led to.